serviceworker.js

// Service worker for Offline Web IDE
const VERSION = 'v104';

const CACHED_RESOURCES = [
  'blockly/blockly_espruino.js',
  'blockly/blockly_robot.js',
  'blockly/blockly_gfx.js',
  'blockly/blockly_menu.js',
  'blockly/blockly_nordic_thingy.js',
  'blockly/blockly_smartibot.js',
  'blockly/blockly_ble.js',
  'blockly/blockly_bangle.js',
  'blockly/blockly_compressed.js',
  'blockly/blocks_compressed.js',
  'blockly/javascript_compressed.js',
  'blockly/blockly.html',
  'blockly/en.js',
  'blockly/field_textarea.js',
  'blockly/ru.js',
  'blockly/de.js',
  'blockly/media/handclosed.cur',
  'blockly/media/quote0.png',
  'blockly/media/sprites.png',
  'blockly/media/handopen.cur',
  'blockly/media/disconnect.wav',
  'blockly/media/disconnect.mp3',
  'blockly/media/quote1.png',
  'blockly/media/1x1.gif',
  'blockly/media/delete.mp3',
  'blockly/media/delete.wav',
  'blockly/media/delete.ogg',
  'blockly/media/handdelete.cur',
  'blockly/media/click.mp3',
  'blockly/media/disconnect.ogg',
  'blockly/media/click.ogg',
  'blockly/media/click.wav',
  'data/espruino.json',
  'data/app/openTestingLog.js',
  'data/app/openTestingLog.html',
  'data/testing_initial.html',
  'data/sounds/doorbell2.wav',
  'data/sounds/car_horn_x.wav',
  'data/sounds/sirens_x.wav',
  'data/sounds/honk2_x.wav',
  'data/sounds/toot2_x.wav',
  'data/sounds/boxing_bell.wav',
  'data/sounds/truck_horn.wav',
  'data/sounds/phone_ring_old.wav',
  'data/sounds/trolley2.wav',
  'data/sounds/warning_horn.wav',
  'data/sounds/chime_up.wav',
  'data/settings_flasher.html',
  'data/tours/projectSnippet.json',
  'data/tours/project.json',
  'data/tours/testingExt.json',
  'data/tours/testing.json',
  'data/tours/watchExpr.json',
  'data/tutorials/1.js',
  'data/testing_form.html',
  'data/settings_about.html',
  'data/testing_image.html',
  'css/ui-lightness/images/ui-bg_gloss-wave_35_f6a828_500x100.png',
  'css/ui-lightness/images/ui-bg_flat_10_000000_40x100.png',
  'css/ui-lightness/images/ui-bg_highlight-soft_100_eeeeee_1x100.png',
  'css/ui-lightness/images/ui-bg_diagonals-thick_20_666666_40x40.png',
  'css/ui-lightness/images/ui-bg_glass_100_fdf5ce_1x400.png',
  'css/ui-lightness/images/ui-icons_228ef1_256x240.png',
  'css/ui-lightness/images/ui-bg_diagonals-thick_18_b81900_40x40.png',
  'css/ui-lightness/images/animated-overlay.gif',
  'css/ui-lightness/images/ui-bg_highlight-soft_75_ffe45c_1x100.png',
  'css/ui-lightness/images/ui-icons_ffffff_256x240.png',
  'css/ui-lightness/images/ui-bg_glass_100_f6f6f6_1x400.png',
  'css/ui-lightness/images/ui-icons_ffd27a_256x240.png',
  'css/ui-lightness/images/ui-icons_ef8c08_256x240.png',
  'css/ui-lightness/images/ui-icons_222222_256x240.png',
  'css/ui-lightness/images/ui-bg_glass_65_ffffff_1x400.png',
  'css/images/treeview-black-line.gif',
  'css/images/treeview-red.gif',
  'css/images/file.gif',
  'css/images/treeview-red-line.gif',
  'css/images/treeview-default-line.gif',
  'css/images/plus.gif',
  'css/images/treeview-gray-line.gif',
  'css/images/folder.gif',
  'css/images/treeview-famfamfam-line.gif',
  'css/images/minus.gif',
  'css/images/folder-closed.gif',
  'css/images/treeview-default.gif',
  'css/images/treeview-black.gif',
  'css/images/treeview-gray.gif',
  'css/images/treeview-famfamfam.gif',
  'img/icons.png',
  'img/icon_128.png',
  'img/icon_patreon.png',
  'img/icon_twitter.png',
  'img/icon_youtube.png',
  'img/ide_logo.png',
  'favicon.ico',
  'webapp_manifest.json',
  'index.js',  // auto-generated file of squished JS
  'index.css', // auto-generated file of squished CSS
  'index.html',
  'emu/common.js',
  'emu/emulator_banglejs1.js',
  'emu/emulator_banglejs2.js',
  'emu/emu_banglejs1.html',
  'emu/emu_banglejs2.html',
  'js/plugins/emulator.js',
  './'
];

const CACHE_PREFIX = 'espruino-web-ide-';
const CACHE_NAME = CACHE_PREFIX + VERSION;
let warnMessages = [];

self.addEventListener('install', function(event) {
  console.log('serviceworker> '+VERSION+' installing.');
  // force the waiting service worker to become the active service worker.
  self.skipWaiting();
  // Load cache
  event.waitUntil(
    caches.open(CACHE_NAME).then(function(cache) {
      //return cache.addAll(CACHED_RESOURCES);
      // this fails nicely if one file is not found
      return Promise.all(
        CACHED_RESOURCES.map(function(url) {
          return cache.add(url).catch(function (reason) {
            warnMessages.push("serviceworker> " + url + " failed! " + reason.toString())
          });
        })
    );
    })
  );
});

// Use the cache, fallback to network
self.addEventListener('fetch', function(event) {

  if (warnMessages) {
    warnMessages.forEach(line => console.warn("serviceworker> " + line));
    warnMessages = undefined;
  }

  event.respondWith(
    caches.match(event.request, {ignoreSearch: true}).then(function(response) {
      return response || fetch(event.request);
    })
  );
});

// Delete old caches when we change VERSION
self.addEventListener('activate', function(event) {
  event.waitUntil(
    caches.keys().then(function(cacheNames) {
      return Promise.all(
        cacheNames.map(function(cacheName) {
          if (CACHE_NAME !== cacheName) {
            return caches.delete(cacheName);
          }
        })
      );
    }).then(() => {
      console.log('serviceworker> '+VERSION+' now ready to handle fetches');
    })
  );
});